May 26th, 2010

After traveling for about 8 hours from Aachen, the permanent magnet arrived already mounted inside the vacuum case last Wednesday, at 8 o’clock in the morning.

It was then removed from the “packaging” used to transport it from Germany. Now it rests in the clean room where it will undergo magnetic fields measurements before taking the place of the superconducting magnet that, in the meantime, has reached room temperature and pressure and is ready for the swap.

A team from CERN Detector Technologies Department will first map magnetic field’s intensity and direction all over the volumes used for cosmic rays momentum measurements. Deflected by the magnetic field, charged particles are indeed detected through their trajectories.

During the following three weeks, magnets’ substitution will be completed. All the detector subsystems have been already deintegrated from the experiment. This process took about one week. The present vacuum case will soon be detached from the mechanical structure, to be replaced.